How can I detect if a file is binary (non-text) in dart?

Question

In a dart console application, how can I tell if a file is binary (non-text)?

Answer 1

Read the file content and check if you find non-displayable characters. An example would be \u0000 or consecutive \u0000, which often occurs in binary files but not in text files.

See also How can I determine if a file is binary or text in c#?, https://stackoverflow.com/a/277568/217408